CHARLOTTE, N.C. -- A protracted NBA lockout, or the cancellation of the whole season, could have a dramatic impact on the U.S. Olympic team, so says coach Mike Krzyzewski.

Krzyzewski is worried that a drastically altered NBA season could impair his ability to get his team ready for the 2012 Olympics next summer in London.

Mike Krzyzewski may have his work cut out for him with the U.S. national team. (AP Photo)

"We're obviously really concerned," Krzyzewski, who moonlights as Duke coach, said Wednesday at the ACC media day. "What if there isn't a season? What if they expand (the season past June) if they start playing?"

He said there are several contingency plans should the NBA and players' association not come to an agreement on a new CBA and begin play by the end of the year.

Should the NBA cancel the season, Krzyzewski said, he would bring 20-25 players to a late-spring tryout minicamp.

"How can you select a team not knowing who is in good condition and who is sharp," Krzyzewski said Wednesday. "Normally, we just monitor the games and evaluate the players that way and select the team. We might not have that option this time."

Should the NBA resume play at some point before January, Krzyzewski said, USA Basketball would select the team as usual and go straight into training camp the first week of July. The basketball tournament at the London Games is scheduled to begin July 28 and end with the gold medal game Aug. 12.

Even if the NBA and players' association come to terms soon, Team USA's preparations could still be disrupted as it attempts to repeat as gold medal winners. Krzyzewski said he's concerned with the NBA extending the season several weeks to get in as many regular-season games as possible. That could push the NBA playoffs into July.

"If the NBA has to go into July, what does that do for us?" he said. "We're going to wait until spring to announce who the 12 players will be on the team no matter. We have a great pool because everyone wants to play."